Stress–strain curves of Al–4.5 mass%Cu alloy in semi-solid state

• Published in: Journal of Japan Institute of Light Metals Vol. 63; no. 6; pp. 229 - 233
• Main Authors: Sakaguchi, Nobuhito, Tsunekawa, Masanori, Watanabe, Yoshio
• Format: Journal Article
• Language: Japanese
• Published: The Japan Institute of Light Metals 30.06.2013
• Subjects: in situ observation; semi solid; stress–strain curve; tensile test
• ISSN: 0451-5994; 1880-8018
• DOI: 10.2464/jilm.63.229

The stress–strain curves in semi-solid state of Al–4.5 mass%Cu alloy, whose deformation behaviors had classified into six stages in previous study, were investigated in this study. The mechanical properties, such as elastic modulus, derived from stress–strain curves are necessary to estimate the hot tearing by CAE. Shapes of stress–strain curves in semi-solid state changed with temperature as same as deformation behaviors. Elastic modulus calculated from stress–strain curves were smaller than that calculated by general commercial software. This difference of elastic modulus was about three fingers in Pa. This difference would be caused by the melting of grain boundary and the disappearance of contact between solid phases. Elastic modulus obtained by the stress–strain curve should be more appropriate for CAE than the value calculated by commercial software.